Attachment-plug.



S. TROOIJ.

ATTACHMENT PLUG.

APPLICATION FILED 0GT.26,1912.

1,049,945, Patented Jan. "7, 1913.

Fig.2.

yummu S j Sa MT contact ring on the body of the plug.

all??? SAMUEL TEE-00D, OF PITTSBURGH, PENNSYLfANIA, ASSIGNOR TO THE BRYANT ELEC- TRIC COIKPANY, 0F BEIDGEPOBT, CONNECTICUT, A COBPDRATION OF CONNEOTI Specification of Letters Patent.

ATTACHMEN T-PLUG.

Patented Jan. 7, i913. v

Application filed Qctober 26, 1912. Serial No. 727,962.

CUT.

Lflaflila.

To (ZZZ trim/1. if m (1 concern.

it known that i SAMUEL Tnoon. a

citizen of the United States of America, and residi' u at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a certain new and Improved Attaclnuent-Plug, of which the following is a specification.

lily invention relates to attachment plugs and particularly to the type of plug oommonly referred to as a swivelingplug, the object of my invention being to provide a plugof this type which is economical to, manufa ture and eiiicient in operation.

accompanying" drawings, Figure l ..cal so on through a plug in which ion is illustrated inone form; Fig. 2 a dropped section partly'in elevation; Fig. 3 a side elevation partially broken away; and Fig. is a perspective of the side The present attachment plug-gin the form illustrated comprises a tubular body portion it) of insulating material, the upper 'end 12 of which above the shoulder 11 of slightly reduced diameter and threaded to receive a retaining nut-13. Adjacent its lower end the plug is slightly recessed to form a shoulder 14 which constitutes an' abutmentfor the upper edge oil the side con tact ring 15, the latter being sleeved on the lower end of the plug; body 10. An upstandinnlup' ill. on the ring 15, is angled into the rec 17 which opens through the side wall oi the body into its interior chamber 18. This log 1Q carries a binding screw by means of which the bared end of the leadingdn 1 l9 may be secured. thus bringing; the

l o branch of the plug circuit.

int .rnallv threaded eyelet 20 which receives l 7 rev; 21. The countersunk head' I the L ic ei is notched at 22in register with he longitudinal perforation-.3 3 in the lower "to pl to permit the adjustment of i rue other leading-in wire 1 the head of the binding screw 21, 1th the head of the eyelet 20, forms the coder contact of the plug. it. screw carried by a button so of insulatl. and provided with an internal slipped over the upper end of l0 1 the internal diameter 2? being such thutu snug swivciueut is established between the only positions the swiveling screw shell 25 in proper relation to the side contact ring 15, but also establishes the engagement of the parts whereby the plug a whole is drawn into the socket when the shell 25 is screwed home in the latter. The retaining nut 13 prevents the escape of the screw shell from the body or the plug when the latter isnot in use. As will be observed, the threads on the stem 12 at the head of the plug are stopped at such point as will prevent the ring 13 being screwed down enough to bind the button 26 and prevent it from swiveling freely,whilo at the same time undue'longitudinal play between the parts i5 not permitted.

A plug construction substantially as described is of few parts, all readily made and assembled, while the finished plug afiords all the elements of strength and serviceability which fit it for efiloient use.

I claim as my invention 1. An attachment plug comprising a hollow insulating body with lateral and end perforations communicating; with the inter rior of said body, an external side contact ring having a Wire terminal lug angled into said lateral perforation, and a Wire tenninal adjacent the end perforation, whereby wires led. through said hollow body may be respectively connected to said side and end terminals, in combinatipn with a screw shell in swiveling engagement with said side contact ring, substantially as described. A

2. in an attachment plug, an insulating body having a side contact and a screw shell having aninternal sleeve in swiveling engagementwith said side contact, substantially as described, In an attachment "plug, a hollow insulating; body, with lateral apert u'e, a side contact ring having a wire terminal angledinto said aperture to connect with a wire .-led through the hollow body of the plug,

lating body, with lateral aperture a side in swiveling contact with a Wire terminal infn said zipei'uue in 001121 ct i h :1, M 112155, led iii'ircugg h he hollow 13053, of the plug swiveiii. gongagmnsnt with said side Contact 111d a screw shell with internal sieeve in ring"; 11rd retaii'iing 1111i: ihreruled 011 (he swiveling contact Wifli. said iii. upper and of the plug body subsizmtallv as 1m nitachmei'iil plug; con 6' scribed. imv insniafim: body with later tssiimony };3Iff 1'21"ti(. n1 c011inmnicuiing W v 7 me in E'iiiss we aim. of said body, an. OKiQCflL. 1 ring 11:1 vim; a wire ikllhiilfill .i' zm ieci i: to said him- 11 purfo iii'ion, and a ire tel-m1 :uijnceni iizc 0nd neirfinrabion whereby ieti through said i'xoiiciw imdy 1112"; be

(mmmvted to said side 21m} @1161 iermicmnbimziisn Wi h a. screw shell in 1:. 

